| |
Click on image for the lowdown. 
====
| | |
12 members (panel fan, FAST55, frogfarmer, JW51, Wayne67vert, Gdads51, Lightholder's Dad, gswbbc, 48jim1ton, tclederman, Ponchogl, 1 invisible),
71
guests, and
0
robots. | | Key: Admin,
Global Mod,
Mod | | | Forums66 Topics128,049 Posts1,055,553 Members48,425 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | 
#71617 01/14/2007 3:29 AM | Joined: Oct 2005 Posts: 1,317 Shop Shark | | Shop Shark Joined: Oct 2005 Posts: 1,317 | Like many others, I have tried to run a PCV valve, only to go back to the road draft tube.
I tapped into the top of the draft tube installed grommet and PCV valve, ran a 3/8" hard line around to the the stock intake. Used short sections of 3/8 tube to tie it together. Had to sleeve down the rubber tubing to tie in with the 1/8 NPT fitting on the manifold. Plugged the lower end of draft tube and used a vented cap on the valve cover. It seemed like there just wasn't enough volume of air (vacuum) through the intake fitting.
Has anyone drilled and tapped out the 1/8"NPT intake fitting to 3/8 NPT? Does this sound like a viable way to get increased volume of vacuum to the pcv valve?
I'm starting out with a freshly rebuilt 235 and would like to upgrade and close the venting system. I sure would appreciate any input you might have. Thanks in advance. | | |
|
|
| |
